THE SUBMILLIMETER AND MICROWAVE SPECTRA OF HZnCl (X $^1\Sigma^{+}$)
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Date
2008
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Publisher
Ohio State University
Abstract
The pure rotational spectra of HZnCl ($^{1}\Sigma^{+}$) has been studied using submillimeter-wave direct-absorption and Fourier transform microwave (FTMW) methods. This species was produced by the reaction of zinc vapor and Cl$_2$ in the presence of H$_2$ and a d.c. discharge for the millimeter studies. For the FTMW measurements, HZnCl was made by the reaction of chlorine gas and Zn(CH$_3$)$_2$ in a d.c. discharge created in the supersonic nozzle. The spectra of seven isotopologues were recorded including the deuterium substituted species. We were able to obtain the rotational constants of B$_0$ and D$_0$ for each isotopologue. Using the FTMW data, we observed the hyperfine components of the lower J transitions and determined the chlorine quadrupole constant. For HZnCl, the average Zn-Cl bond length was determined to be 2.083153(21) $\AA$ with the H-Zn bond length equal to 1.51909(38) $\AA$. From HZnCl to its open shelled counterpart ZnCl, the bond length was found to contract by ~0.05 $\AA$ suggesting that the hydrogen stabilizes the molecule.
Description
Author Institution: Department of Chemistry, Department of Astronomy, and Steward Observatory, University of Arizona, Tucson, AZ, 85721